Hi Terence, thanks for this page – I found a selfie button in my local PoundWorld store, looks exactly like the one you have pictured (externally, at least), but I can’t get the Pi to recognise it. Both the Pi and selfie button are working with other devices. The Pi dongle reports as ” Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)” in lsusb and this seems to be the “chipset of choice” on various forums. I’m persevering & will update you as I get results (or not).